JPS62110025A - Roller bearing with track ring having block construction - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention comprises two divided bearing rings that are formed in a plane perpendicular to an axis, and a retaining ring that connects the two divided bearing rings. The present invention relates to a rolling bearing of a type in which the split bearing ring has an annular groove formed in the vicinity of its split surface for fitting a retaining ring, and the retaining ring is provided with a protrusion that fits into the annular groove.

(Prior Art and Problems) According to Federal Republic of Germany Utility Model No. 8125975, an inner ring is divided into two on a plane perpendicular to the axis, and both divided inner rings are connected by a retaining ring. Bearings are already known. The roller bearing described there has two rows of tapered rollers in a face-to-face configuration. In this case, during assembly, it is necessary to securely insert the subdivided inner ring from both sides. In order to prevent it from falling off during transport, or to facilitate assembly of the roller bearing, the subdivided inner ring is connected by a retaining ring during assembly.

The retaining ring is made of an elastic material, such as synthetic resin, and has a U-shaped cross section. The legs on both sides of this U-shaped member form endless annular protrusions on both sides, each of which enters an annular groove near the dividing surface of the divided inner ring. A cylindrical bushing portion is in contact with the circumferential surface of the divided inner ring. This allows the split inner rings to be concentrically connected. In order to fit and assemble the retaining ring, the circumferential surface at the starting end of the split inner ring has a conically inclined shape starting from the end surface thereof, thereby forming a guiding inclined surface. When assembling and inserting the split inner ring, the protrusion of the retaining ring is guided while sliding on its guide slope. It is therefore necessary to widen the entire retaining ring, which, including the annular projection, must be enlarged by at least its radial dimension. This requirement imposes stringent requirements on the elasticity of the material. In particular, with the known retaining rings mentioned above, the elastic recovery properties are very poor in the case of projections of just the right dimensions to obtain the required projections.

Therefore, in order to increase the limit range of elongation, a retaining ring of thin material must be provided, and for this purpose,
This results in very poor and unstable bonding.

Many conventional retaining rings are used not only for double row circular roller bearings, but also for double row angular ball bearings or single row three and four point contact bearings. In this case, depending on the embodiment, the retaining ring also guides the rolling elements, and if the retaining ring has the elastic properties of the known retaining rings mentioned above, there is a risk that the guide surfaces will bend or wear out. Alternatively, since the surface becomes smaller, basically bad conditions will be presented.

(Means, operations and effects for solving the problems) It is an object of the present invention to enable rolling bearings of the type mentioned at the outset to be joined together by their segmented bearing rings with a small force during assembly, in which case both axial and radial The purpose is to obtain a reliable and stable bond in the direction.

According to the invention, the above objects can be achieved in that the retaining ring has a cylindrical bushing part, and the projections are continuous with the bushing part, inclined with respect to the radial plane and having bending elasticity.

The projection is then formed continuously on the bushing part of the retaining ring, for example via a relatively thin section forming a bending hinge. This provides sufficient deformation travel distance of the protrusion to facilitate assembly. The bushing part made integrally with this protrusion can be made quite thick since there is no need to expand the bushing part during assembly. Also, for the same reason, very hard and durable materials can be used which allow a secure concentric connection in the radial direction to the entire retaining ring, providing dimensional stability. Furthermore, this provides a guide surface that has sufficient wear resistance against the rolling elements. With a corresponding circumferential surface, the retaining ring according to the invention is in close contact with the corresponding shoulder surface of the split raceway.

The inclined part of the projection itself forms a guide surface and is pressed against the bushing part by the generally slightly chamfered segmented raceway edge during insertion, so that during assembly the cone in the segmented raceway is no longer visible. A shaped guide surface is no longer required. The mutually inclined protrusions according to the present invention do not receive bending loads when the split raceway rings try to move in the direction of separation after assembly.
Rather, the compressive force is applied linearly in the side area of the bushing in the direction of the inclination. This creates an ideal axial connection that cannot be broken without applying force.

Of course, if necessary, this connection can be removed by suitable means without damaging the bearing. The retaining ring formed according to the invention can be used in all rolling bearings requiring such a coupling method and can be applied to the inner ring as well as to the outer ring, in which case the inner or outer circumferential surface has a corresponding An annular groove is provided at the location.

In a further feature according to the invention, the projection is formed as a plurality of snap pieces that are distributed circumferentially and can be deformed independently of one another.

This allows the snap piece to be subjected to bending loads in a favorable manner and avoids large distortions of the material during assembly. Furthermore, less force is required for the connection due to bending deformation during assembly.

In an advantageous embodiment of the invention, an intermediate chamber is formed between each snap tab corresponding to its extent in the circumferential direction, and the snap tabs on one side of the retaining ring are arranged on the opposite side of the retaining ring. The snap pieces are arranged circumferentially shifted from each other by the arrangement pitch of the snap pieces. It is very simple and advantageous if these snap pieces, which are arranged coincident with the oppositely located intermediate chambers and are offset from one another, are manufactured by injection molding, for example, from synthetic resin. The mold required for this purpose has a finger-like projection passing through the intermediate chamber, which is inserted from both sides of the retaining ring and forming a ring without a cut in the central part between its snap pieces. It takes shape. The molded retaining ring can then be removed from the mold in the axial direction.

Therefore, the mold can be produced inexpensively and a simple molding machine is sufficient.

Another feature of the present invention is that the annular groove has a cross section of V
The shape of the snap piece is formed to match the shape of the annular groove, and when the snap piece is restored to its original shape by its own elastic force, between the annular groove and the opposing surfaces of the snap piece, A narrow gap is provided.

By adapting the annular groove to the shape of the snap piece, a particularly stable axial movement can be achieved, for example when the split raceway rings try to move apart under unexpectedly large forces during disassembly of a rolling bearing. You can get a bond. Furthermore, the annular narrow gap has the function of compensating for unavoidable manufacturing tolerances and also facilitating the elastic deformation of the snap piece during assembly. It is particularly advantageous to provide a large number of snap tabs distributed circumferentially. This is because the projections then have a very small width in the circumferential direction of the retaining ring, and the required circumferential shape has little effect on the bending capacity.

(Embodiments) The present invention will be described in detail below with reference to embodiments shown in the drawings.

The drawing is a cross-sectional view of a portion around the dividing point of a double-row roller bearing having an inner ring divided into two in a plane perpendicular to the axis of the bearing.

The two divided J71 inner rings 1.1 are in contact with each other at their opposing end faces 2, 2, and a collar 3 is provided on each side thereof. And Koro 7
The end surface thereof is in contact with the inner surface 4 of the collar portion 3. The two divided inner rings 1, 1 are connected to each other by a fitted retaining ring 5. The retaining ring 5 covers the entire width of both flanges 3 and its end face 6 reaches the end face of the roller 7. The retaining ring 5 has a thick, substantially cylindrical bushing portion, and snap pieces 9, which are inclined with respect to the radial direction, are formed on both sides of the bushing portion and are distributed in the circumferential direction.

These snap pieces 9 form a bend in the transition area to the bushing part 8, and this bend can be bent until each snap piece 9 is completely oriented in the axial direction. For this purpose, the bushing part 8 has an annular recess 1) which provides sufficient space for the bending of the snap piece 9.

In the assembled state, the snap piece 9 is returned by its elasticity to form an annular shape with a 7-shaped cross section, which is machined into the flange 3 of the split inner ring 1. It's stuck inside 312. The surface 14 of the annular groove 12 on the side of the dividing surface 13 is located in a radial plane;
The other surface 15 extends in a direction inclined with respect to the wall 7. The annular groove 12 is formed to match the shape of the snap piece 9, in which case a gap 16 is provided between the groove surface of the annular groove 12 and the snap piece 9. On the other hand, the bushing part 8 is
It is in contact with the circumferential surface 17 of the collar portion 3 without any gap.

During assembly, although the process is not shown, it is simple and easy to imagine that the slightly chamfered edge 18 of one divided inner ring 1 forms a snap piece 9 that acts as a guide surface.
is applied to the radially inner surface 19 of. In this case, the snap piece 9 bends its transition area 10 into the annular recess 1). As the snap piece 9 continues to move, it reaches the area of the annular groove 12 and automatically springs into it. The insertion of the other split inner ring 1 on the opposite side of the retaining ring 5 takes place in the same manner as described above. In this case, the retaining ring 5 rests against the rollers 7 via its end face 6.

One row of snap pieces 9 is shifted from the other row of snap pieces 9 by the arrangement pitch of each snap piece in the circumferential direction, so that one row of snap pieces 9 can be easily manufactured by injection molding. The pieces 9 face an intermediate chamber 20 of the same width between the other snap pieces. The number of snap pieces in each row is not particularly limited, but at least 1
Preferably, two pieces are formed.

[Brief explanation of drawings]

The drawing is a partial sectional view of a rolling bearing according to an embodiment of the present invention. ■・・・・・・・・・ Split inner ring 5・・・・・・ Retaining ring 8・・・・・・ Button part 9・・・・・・ Snap piece 12・...... Annular groove 13 ...... Dividing surface 14 ...... Annular groove surface 15 ...... Annular groove surface 16・・・・・・・・・ Gap

Claims (6)

[Claims] (1) It has two divided bearing rings 1, 1 that are formed in a plane perpendicular to the axis, and a retaining ring 5 that connects the two divided bearing rings, and the divided bearing ring has the divided bearing rings. An annular groove 12 for fitting a retaining ring is formed near the surface 13, and the retaining ring 5 has a protrusion 9 that fits into the annular groove.
The retaining ring 5 has a cylindrical bushing part 8, and the protrusion 9 is inclined with respect to the radial plane and is continuous with the bushing part 8 with bending elasticity. A rolling bearing having a raceway ring with a split structure. (2) The trajectory of the split structure according to claim (1), wherein the protrusions are formed as a plurality of snap pieces 9 that are distributed in the circumferential direction and can be deformed independently of each other. Rolling bearing with rings. (3) Between each snap element 9, an intermediate chamber 20 corresponding to the width in the circumferential direction is formed. A rolling bearing having a divided raceway ring according to claim 2, wherein the snap pieces are arranged circumferentially offset from each other by the arrangement pitch of the snap pieces. (4) The annular groove 12 is formed by an annular groove surface 14 extending in a radial plane on the side of the dividing surface 13 and an annular groove surface 15 conically inclined with respect to the other end of the divided bearing ring 1. Cross section V
A rolling bearing having a divided structure bearing ring according to any one of claims (1) to (3), characterized in that the bearing ring is formed in a letter shape. (5) The snap piece 9 is formed to match the shape of the annular groove 12, and when it is elastically returned, the snap piece 9
2 and the snap piece 9, a narrow gap 16 is provided between the oppositely formed surfaces of the snap piece 9. A rolling bearing having a bearing ring having the split structure described above. (6) At least 12 snap pieces 9 are provided, each of which is distributed in the circumferential direction. A rolling bearing with a raceway ring with a split structure.